Obesity increases the risk of a number of health conditions including hypertension, adverse lipid concentrations, and type 2 diabetes (1). The

prevalence of obesity in the United States increased during the last decades of the 20th century (2,3). More recently there appears to have been a slowing of the rate of increase or even a leveling off (4,5). Given the health risks of obesity and its high prevalence, it is important to continue to track the prevalence of obesity among U.S. adults and children. This report presents the most recent national estimates of obesity in the United States based on measured weight and height.